BodyForce.cpp
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	#include "BodyForce.h"
	#include "ATC_Error.h"

	#include <iostream>
	#include <fstream>
	#include <vector>

	using ATC_Utility::command_line;
	using ATC_Utility::str2dbl;
	using ATC_Utility::str2int;
	using std::fstream;
	using std::string;
	using std::map;
	using std::vector;

	namespace ATC {

	BodyForceViscous::BodyForceViscous(
	fstream &fileId, std::map<std::string,double> & parameters)
	: BodyForce(), gamma_(0)
	{
	if (!fileId.is_open()) throw ATC_Error("cannot open material file");
	std::vector<std::string> line;
	while(fileId.good()) {
	command_line(fileId, line);
	if (line.size() == 0) continue;
	if (line[0] == "end") return;
	double value = str2dbl(line[1]);
	if (line[0] == "gamma") {
	gamma_ = value;
	parameters["gamma"] = gamma_;
	}

	}
	}

	}